Akai SW-150 speakers

 

Superb Hifi Stereo Sound Effect

Akai 3-way stereo speaker system with high and midrange level controls. SW-150 is design matached to high fidelity Akai stereo tape recorders. Enjoy perfect reproduction of pure sounds from exciting high notes, to mellow, vibrant low tones

 

Specifications

Speakers:

Low Frequency:  12" Woofer

Mid Frequency:  5,25" Midrange

High Frequency:  2" Tweeter (Horn Type)

Impedance:  8 ohms

Max. Power Input:  40 W

Frequency Response:  40 - 20,000 Hz

Dimensions :  25-1/4" x 16" x 11-3/4"

Weight:  35,2 lbs (each)

Philips GA312 turntable

Servo electronic turntable with integrated tone arm

Electronically controlled for smoother reproduction

 

 

Features

A free-floating sub-chassis is suspended independently over the main chassis. The rigid main chassis absorbs any vibration. The floating sub-chassis gives further protection to stylus and record

Electronic stop system eliminates stylus side thrust distortion, temporary cross talk, thumping and groove jumping.

DC motor is combined with a tacho generator. A mini-computer regulates its operation. The computer constantly monitors the running speed. Any deviation - such as changes in cycle current or cleaning brush drag - is instantly corrected.

The driven platter is isolated from motor vibration by a shock-absorbing, precision ground and stabilized polyurethane drive belt. Flutter and rumble are dramatically reduced.

Elastically decoupled counterweight balances the cartridge weight in all planes.

Electronic circuits adjust the speed for 33-⅓ and 45 rpm records. Each speed hasd its own fine adjustment control. All controls have a ligh indicator

Tone-arm cue control lets you raise or lower the arm at any part of the record. Tone arm cueing is feather light, viscous damped and extremely accurate.

Adjustable anti-skating device counteracts the centrifugal force of the spinning record.

 

Specifications

Controls: electronic lighted indicators for 33-⅓ rpm start, 45 rpm start,and stop. Rocker bar for tone arm lift and cue. Two independent potentiometers for speed calibration

Speeds:  3-⅓ and 45 rpm

Speed Calibration Range:  ±3%

Wow and Flutter: 0,1%

Total Audible Rumble:  -62 dB measured according to hearing curve DIN B

Stylus Force Range:  0 to 4 grams

Side Thrust Compensation:  Adjustable for elliptical and spherical styli

Tone Arm:  Integrally coupled with platter on a free-floating sub-chassis for shock isolation

Arm Resonance:  7 kHz

Cartridge Mounting:  Slide-out plate universal, 1/2" mounting centers. Stylus overhang gauge provided.

Platter:  11-1/2" with anti-static rubber mat, 60 Hz stroboscopic ring included

Automatic Stop:  frictionless photocell-electronic system

Motor:  72-pole electronic tacho controlled DC servo motor

System:  belt-drive

Power Supply:  120 Volts AC, 50/60 Hz without modification or convertor UL approved

Power Consumption:  4 watts

Dimensions (W x H x D):  15-1/2" x 6-1/4" x 13-1/4")including dust cover)

Weight:  13,25 lbs (net)

 

Dahlquist M909 loudspeaker

The Dahlquist "M Series" ends the need for compromise. Originally designed for recording and broadcast studios, several models can now be offered for home use because of new techniques. In the Dahlquist tradition, the M Series solves many of the problems that still degrade the sound of other speaker systems. The Dahlquist M Series loudspeakers are the first fully enclosed systems to reproduce all the of the subtle, low level details of the music in the midst of extremely high level music signals. The reproduction of such dynamic shadings makes music come startlingly alive.

The Dahlquist M909

The M909 is a unique blend of technologies. This three-way system has the Dahlquist Un-Box enclosure and critically matched loudspeaker drivers, as do the other members of the M Series. But, in an exciting departure, the M909's specially designed midrange driver shares the cylindrical loading originally developed for the DD-20. as a result, the M909 not only gives the listener superb performance throughout the audio range it gives an extra measure of performance in the critical midrange, where most of the music "happens".

 

By using two matched high speed woofers, the M909 is able to deliver exceptional power in the bass and mid-bass regions. This brings home the type of sound power felt at a live concert -  and typically missing from home listening. These dual matched woofers have the additional benefit of providing a seamless transition to that all-important midrange.

Further, the M909 recreates a sound image of exceptional fidelity. The M909's reproduction of soundstage height, width, and depth draws the listener into the performance. These outstanding capabilities are apparent as life-sized images in space.

Thus, for the first time, experienced listeners can have it all-from a single loudspeaker system that fits in almost any size room, be it an intimate studio with a modestly powered receiver or a living room of generous proportions with high-powered, state-of-the-art electronics.

One of the hallmarks of Dahlquist loudspeakers is the coherency of the total sound. The M909's four drivers blend together seamlessly. As a result, harmonic relationships are accurately preserved. Individual instruments, and especially the human voice, retain their own distinct characters.

Naturally, as is expected from a Dahlquist loudspeaker system, the M909 incorporates as advanced and remarkable anti-diffraction technique which enhances accurate stereo imaging and greatly contributes to open, spacius, and accurate sound reproduction.