THE DAYTON WRIGHT LCM-1 LOUDSPEAKER
DAYTON WRIGHT GROUP LTD.
Revised: AUGUST 19, 1982
THE DAYTON WRIGHT GROUP LTD.
97 Newkirk Road North
Richmond Hill, Ontario L4C 3G4
LCM-1a LOUDSPEAKER SYSTEM
These units are 3-way loudspeakers designed using Dayton Wright's proprietary Controlled Periodicity Technology. While they appear quite simple, they do require some care in setting-up to realise their full potential.
For the deepest bass response, the speakers should be located so that the rear surface of the speaker is from three to ten inches from the surface of the wall behind the speaker, but for the best stereo imaging with slightly reduced bass extension the speaker should be placed from ten to twenty inches from the surface of the wall behind.
Eye level 3 Inches down from the top of the speaker
The speakers should be mounted on stands or some other form of rigid support so that the listener's line of sight, when parallel to the top of the speaker, falls on a point about three Inches down from the top of the speaker. If the top of the speaker can be seen in the listening position, the high frequencies will be a touch too strong for proper balance. On the other hand, if the speaker supports are too tall, the speaker may seem to lack high frequency extension. A speaker stand about 22 inches tall should be satisfactory. Four 1/4-20 threaded inserts are provided in the bottom of the speaker permitting the speaker to be bolted down to a stand. Do not use bolts that will protrude more than one inch inward from the bottom of the speaker.
The speakers should be placed at least 18 inches away from any side wall, and angled in at least ten degrees if they are within thirty inches of a side wall. This is done to minimize any short- term wall reflections which would cause both phase and frequency ripple effects which in turn would lead to reduced imaging ability. Following this to its logical conclusion, a "Dead End- Live End" room design will result in even better imaging.
Instructions LCM- la Loudspeaker System Page 1
We recommend the use of very-low resistance stranded speaker cable of at least twelve gauge or larger diameter. Smaller wires will reduce the action of the power-amplifier's damping factor and will result in a somewhat "looser" quality to the bass. Very small wires will make the sound balance excessively dependent upon the input impedence of the loudspeaker and will lead to a grainy quality to the sound.
When connecting multiple strand cable make Sure that strands do not bridge the "Hot" and "Ground" terminals of either the power amplifier or the loudspeaker as otherwise damage to the speaker and/or the power amplifier could take place.
Do not attempt to remove the captive nuts from the speaker terminals, as this could break the internal connections within the speaker.
When setting up a system, the transparency of the LCM-1a's may well reveal problems with other equipment in the system that had not been heard previously. The Vertical Tracking Angle of the phono cartridge and the Anti-Skating adjustments on the turntable arm are quite important, if set improperly the resulting mis- tracking will show up as a glassy quality in the sound.
Power amplifiers should be checked to see that they will function into four-ohm loads. Some small receivers are designed to run into eight ohm loads only, these will not operate at their rated power into the LCM-la's which are a four ohm speaker. Although the continuous power rating of the LCM-1a is 30 watts RMS, power-amplifiers with ratings (RMS/Channel) of from 30 to 200 watts are acceptable although with the higher powers it is obvious that precautions should be taken in the volume settings of the system to make sure that the speakers are not operated under a continuous overload. If damaged due to burn-out, the speaker's warranty is voided.
The LCM-la's have been designed to produce concert-hall levels (as judged from the fifteenth to twentieth row) on classical music in a typical living room of about fourteen-feet wide, by twenty feet long, by eight feet high. Be careful of setting the volume too high on extended listening sessions. The listener's sense of loudness will be altered if this is done with the result that there is a tendency to steadily increase the listening volume to compensate for this hearing deficiency; this could lead to a bad overload of the speakers.
Under party conditions, the normal thing to do is to increase the volume of the music to override the sound of the people. This too could lead to a condition of overload.
When using the LCM-la's with Stereo Television adapters, beware of the type of adapter that does not mute the sound when changing channels. Very substantial low-frequency components and very high sound levels are present otherwise, and this could damage the speakers.
Page 2 Instructions - LCM-1a Loudspeaker System
On popular music, be cautious of very loud levels of synthesizer sound at high frequencies. When these instruments are recorded directly, they do not follow the normal power-distribution curves of acoustic instruments and may require such excessive power handling levels at frequencies above 10,000 Hz that the tweeters could be damaged.
Compact disk recordings are not a problem for the LCM-la's provided that some common sense is used in setting the listening volume. A very small reduction in volume can cut the power requirement in half!
Every LCM-1a has been tested for frequency response, phase response, and coherence by computer controlled test equipment. Using this technique of computer control allows complex tests to be conducted on every speaker without incurring costs which would be prohibitive in a speaker such as the LCM-1a. Tests such as this, if done, using manual control of the test equipment would take a technician almost an hour to test each speaker. The use of computer control of the test and plotting equipment also insures that every speaker is tested in exactly the same way. No speaker receives a final serial number until it has passed these tests.
We at Dayton Wright are very concerned about some audio industry reviewers who feel that any failure caused by the user, should be covered under the manufacturer's warranty. We feel that they would like the consumer to think that these services do not cost anything whereas they all have to be passed on to the consumer in the form of higher prices.
Our warranty is our pledge to the consumer that as of the time we shipped the product, we had not made any mistakes in production, and had used parts free from defects. As these things are under our control, they should be our responsibility, and we will rectify any such fault at our cost. However, we cannot control the end use of the loudspeakers; therefore we expect the user to accept the responsibility for using the LCM-la's properly. Almost all our customers understand that if we were to include everything under our warranty, we would have to then increase our prices to all our customers to pay for the not inconsiderable costs or repairing the equipment abused by that small percentage of consumers who consistently misuse and abuse equipment. We do not think it is fair to the people who take care of their equipment to make them cover these added costs.
On the other-hand accidents do occur, and we do try to see that any damage that happens can be repaired in such a way that the repaired speaker will meet
Instructions LCM- la Loudspeaker System Page 3
New -speaker specifications.
Every speaker returned to us for repair must pass the same tests as if it was a new speaker before we ship it back. It is unfortunate that the test set-up required to accomplish this is so expensive as to place it beyond the reach of stereo dealers, or even service agencies. That is not to say that the LCM-la's cannot be repaired in the field, for on request, we will provide dealers with replacement drivers at a reasonable price. We think you will understand why we cannot warrant that any speaker so serviced will meet new-speaker performance.
RETURN OF PRODUCT FOR REPAIR:
Any unit that must be returned for repair must be shipped, prepaid and insured to:
Note: The following address' were used until 1988 and are included only for examples
THE DAYTON WRIGHT GROUP LIMITED 97 Newkirk Road North
Richmond Hill, Ontario L4C 3G4
c/o WALKER'S WAREHOUSE (CANADIAN CUSTOMS CLEARANCE)
Newmarket, Ontario, Canada
Shipments must be properly packed as we will not be responsible for shipping damage. Be sure that the nuts on the speaker terminals are tightened so that they do not protrude beyond the back of the cabinet, and wrap each speaker in plastic film to protect the grills. From time to time, small color variations occur in the color of even the black grill cloth, this occurs at the knitting mill and is beyond our control, so please contact us before shipping and we will tell you if both speakers should be shipped so that the grill cloth can be replaced on both units to ensure that they match. Make sure that the shipper that you use is a "Bonded Carrier" within Canada, as otherwise he cannot move the shipment from the border-crossing point to Newmarket where we provide free Canadian Customs clearance services.
Collect shipments will not be accepted unless an authorization number has been supplied by the factory.
Page 4 Instructions - L CM-1a Loudspeaker System
A. An Introduction to the
B. Use and Overloading Problems
D. Technical Information
LIST OF ILLUSTRATIONS:
Figure 1. The LCM-1Mk II
2. Crossover board
3. Interior of cabinet showing crossover
4. Oblique view of cabinet showing crossover
5. Front view of bare cabinet
6. Rear of cabinet
7. Connections on the lower rear
8. Frequency Response
WARNING: TO AVOID DAMAGE TO THE CABINET, DRIVERS
OR GRILL FABRIC
THIS SPEAKER SYSTEM SHOULD NOT BE EXPOSED TO RAIN OR MOISTURE.
Figure 1. The LCM-1Mk II
Figure 2. Crossover board
Figure 3. Interior of cabinet showing crossover
Figure 4. Oblique view of cabinet showing crossover
Figure 5. Front view of bare cabinet - no drivers
Figure 6. Rear of LCM-1a cabinet
Figure 7. Connections on the lower rear
Figure 8. Frequency reaponse
Figure 9. Schematic
PLEASE BE SURE TO SAVE YOUR INVOICE
YOU WILL NEED IT TO VALIDATE YOUR WARRANTY
DAMAGE CAUSED TO THE SPEAKER THROUGH MODIFICATION OF ANY OF THE INTERNAL CONNECTIONS OR COMPONENTS, IS NOT COVERED BY WARRANTY. IN THIS WE FOLLOW THE PREVIOUS POLICY AS REGARDS TO FIELD MODIFICATIONS. FIELD MODIFICATIONS WILL VOID THE WARRANTY AUTOMATICALLY.
It is our sincere hope that you have many years of trouble free enjoyment
from this Dayton Wright Loudspeaker. We are contacted almost weekly
by customers who have purchased speakers as far back as 1990, to tell us
how well the units are working and to inquire about updates. We started
to keep a file on preamplifier owners when we started the company, and
although this was not kept current by L
In addition, some owners are willing to pass on such help as they may be able to give to new owners, if you need assistance or wish to offer assistance please contact us.
Please note that this address all communications information is no longer valid ! It is included only for the record as it was once in the DW manual
Address mail to
The Dayton Wright Group Limited
Director of Customer Service
97 Newkirk Road North
Richmond Hill, Ontario L4C 3G4
Canada. Telephone: (416) 884-8586
The Dayton Wright Group Limited warrants all products sold under the Dayton Wright trade name to be free from defects in workmanship or in parts for a period of 3 years from date of manufacture subject to the following conditions:
1. This is a Limited Warranty under U.S. law.
2. The Warranty may be extended up to one additional year upon the production of the bill of sale by the first owner, but in no case shall it extend beyond 4 years from date of manufacture.
3. The Warranty is not transferable, and extends only to the original purchaser. In the event that a dealer has been using speakers at his home for several months he may be considered to have purchased the speakers from his store. If in doubt, have the dealer certify that the speakers are new stock. If you have any doubt that the speakers you have purchased are new, or if you suspect that the dealer may have sold you a used preamplifier, as new, contact us at once.
Exclusion for damage due to a lightening strike or power surge. Our warranty does not cover anything that is damaged by any incident like this. As the trabsistors in power amplifier, preamplifiers or other components may fail if subjected to a voltage spike, the speaker voice coils might be damage. This type of overload may bottom the voice coil. Evevtually the voice coil former will partially telescope under the repeated strikes. The voice coil will start to rub creating a buzz on long excursions, typically on deep bass. This type of damage may not be immediatley apparent! This type of overload damage is visible when the woofer is disassembled. We reserve the right to charge the owner for the replacement; and the shipping and any customs sharges.
If some months have passed, if we are called on to effect a repair, any such work will be excluded from any subsiquent warranty repair. It must be understood, in advance, that should we attempt a courtesy repair, that it is NOT under any warranty whatsoever!
4. During the period that the non overload Warranty is in effect, the Dayton Wright Group Limited will be responsible for the cost of labor and parts. As Dayton Wright Group Ltd. built the speakers, we will be responsible for the shipping costs of the return shipment. he responsibility for even one way shipment. The customer must prepay all shipments sent to us for repair, collect shipments will be refused. If therefore you are shipping to us from outside of Canada, be sure that you file the proper Export Documents by including them with your shipment; otherwise you may be charged duty on the Original List Price by your country's Customs. There is nothing that we at The Dayton Wright Group Limited can to stop this and therefore we do not accept responsibility for Duty or Brokerage Charges on re-importation of repaired goods into your country. U.S. owners should make out and include the U.S.Customs Form "CERTIFICATE OF REGISTRATION" (Customs Form 4455) with shipments out of the U.S.A.
PLEASE INSURE ALL SHIPMENTS!
5. We reserve the option to examine all 'warranty returns' to determine whether the equipment was abused or misused. If we find that was the case, we will notify the customer before proceeding with any non-warranty repairs.
6. We reserve the option to replace defective units with the equivalent equipment.
7. In no case does our liability exceed the original wholesal price of the equipment.
8. Prior to returning any Equipment, a 'RETURN AUTHORIZATION' must be obtained. This can be done by telephone. We will require the following information:
Name, Address, Phone number, serial and model numbers, date of purchase, Name and Address of Dealer, and the nature of the complaint. To prevent abuse of this Warranty, we reserve the right to charge the customer for service if the equipment is found to have no Defect.
9. A photocopy of the original Bill Of Sale or Invoice MUST accompany all returns. Please enclose this together with as much information that you can on the nature of the malfunction, and be sure that the RETURN AUTHORIZATION number is marked on all packages.
10. Your warranty does not protect you for damage in shipment or for theft. All units shall be well and properly packed nor shipment. We will not be responsible for shipping damage nor for the collection of any claims for shipping damage. We suggest that you use the original shipping cartons which were designed to protect against shipping damage. If these were discarded, we can supply replacements, but we regret that we will have to charge you for them and will have to ship them to you collect. Again, we cannot be responsible for units that were lost or stolen so be sure that you have made proper insurance arrangements prior to shipping.
11. The speakers shall not have been abused or the warranty will be voided. The Dayton Wright Group Limited shall be the sole judge of whether a unit is question has been abused. Abuse includes, but is not limited to: subjecting the units to unreasonable operating or environmental conditions, dropping or other inappropriate physical treatment, overdriving of the units, continued operation onder overload (suchas the sound od a cone bottoming) , continued operation while defective, or while connected to defective equipment, or to equipment operated in a defective manner. Further, the Warranty shall be voided if the unit has been repaired or altered in any way so as, in our judgement, to affect its reliability, stability, or performance characteristics.
12. No Warranty shall apply to units where the serial number has been removed, altered, defaced, or where the serial number plate has been damaged, or where there is evidence that the serial number plate has been removed and replaced. At our option, the Warranty may be voided on units where the serial number been altered, removed, or replaced.
13. The Dayton Wright Group Limited shall not be responsible for damages, consequential or incidental.
14. This Warranty is in lieu of all others, expressed or implied, and The Dayton Wright Group Limited does not authorize any of its employees, agents, distributors, or any other persons to make amendments, additions, extensions, or modifications to the content or intent of same.
15. SUBJECT TO LOCAL LEGISLATION YOU MAY OR MAY NOT HAVE ADDITIONAL RIGHTS AND PROTECTION UNDER THIS WARRANTY.
This Warranty applies only to Dayton Wright products sold in North America
(i.e. Canada, the 48 Contiguous United States of America, Alaska, Hawaii,
and U.S. Possessions and Territories). Units sold outside of these
Geographical limits are warranted by the distributor who imported same, or are covered under a Dayton Wright Group Limited Warranty with modified terms.
Units affected by this clause should be accompanied by a separate Warranty
Possible replacement woofers:
This woofer might require Increasing the diameter of the mounting hole.
Remember that this is just suggestion and that there is no guarentee that Audax will have it available.
© 1980, 1998 Wright Electroacoustics
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