LA-150 Signature Edition (SE) Line Stage Pre-Amplifier
Joule Electra is introducing it newest version of well known
LA-150. The new preamp is a highly refined version of the LA-150
MkII which incorporates exotic capacitors in output stage as well
as some other changes similar to that of our new flagship,
Marianne Electra Memorial Preamp LA-300ME - however, at much
more affordable price. In developing this version of the
150 our quest was for a more fleshed out and musical sonic
signature of LA-300ME while retaining the robust nature of the
Mark II, the winner of HP of TAS Golden Ear Award 2007. We are
delighted that we achieved this goal and the result is a
remarkable preamp possessing all the virtues that most
audiophiles desire in a line amplifier.
The new version, dubbed LA-150 Mark II Signature Edition also uses the same topology
as the original design with both the Mu Follower and Gain Stages
now utilizing the NOS 6350. This tube has long been out of
production but we have several thousand of these tubes on hand.
We have been using this tube for over 17 years in the LA-100,
:A-150 MkII and our OTL's so it was only natural for us to
continue its use in our newest preamp. Needless to say, we have
been gratified with the success of this refinement.
This line stage uses a phase splitter to process the unbalanced
audio inputs as two balanced signals thereafter dramatically
reducing preamp induced distortions and then sum them together
before the output.
The output signal can still be taken from either the plate of
the Gain Stage or from the Mu Follower depending on system drive
requirements. Most systems will sound best with the “Plate
Follower” drive which is implemented with only a single vacuum
step in the signal path. The preamp is very dynamic, completely
free of glare or edginess, and boasts a 3 db down point at 5 and
100,000 cycles respectively. The 10,000 cycle square wave
response is essentially perfect and hum and noise are extremely
low. The bass performance of the preamp is very strong and solid
and the treble is open and airy with great extension.
- All Tube Design including separate tube
regulated B+ supplies for each channel - dual mono
construction
- Separate regulated DC filament supplies
- Four inputs including Tape In/Out - dual output jacks
- All inputs - "Virtual Direct"
- VH Audio & MIT Caps, Cardas or Purist Wire and Jacks, Holco Resistors
- Tape loop does not require buffer stage for isolation
- Separated mute relays for each channel; auto and manual mute
- Separate passive volume and balance system with 'shunt to
ground' input (not in signal path)
- Rear mounted selector switch for short signal path and
- Multiple contacts in signal path
- Adjustable battery bias for gain stage
- "Tri-flex" elastomer suspension for signal board
- State-of-the-art "Sound Coat" and "Ear Isodamp Vibration"
isolation materials
- Remote Included
- Warranty Parts & Labor, 3 yr
|
Specifications |
|
Input Impedance |
15,000 Ohms |
|
Output Impedance |
Selectable: 400 Ohms & 1200 Ohms |
|
Distortion |
< 0.1% @ 5 volts into 5,000 Ohms |
|
Gain Bandwidth |
0 to 11dB, Selectable 100 kHz |
|
Tube Complement |
2 - 6EM7
4 - 6350
2 - O-A2'a (or Zerner Diodes) |
|
Weight |
23 lbs. |
|
Power Consumption |
< 50 watts |
|
Power Storage |
150 Joules |
|
Dimensions |
Width - 17.5 inches
Height - 6.0 inches
Depth - 12.5 inches |
|
Channel Separation
Fequency Response |
> 80dB 10 Hz - 100 kHz (+/- 1 dB)
|
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