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PrimaLuna DiaLogue Seven Monoblocks

$5,499.00 $4,674.00
(You save $825.00)

Product Description

Want the ultimate? Classic Ultralinear all-tube sound, with all the body and glory that you could ask for. For an additional $800 over the EL-34 equipped DiaLogue Six, you will get an amplifier that has better bass authority, increased detail and definition, and a little more air on top, but never edgy.

In addition, the ProLogue Seven comes specially equipped with the following upgrades:

  • Upgraded Solen capacitors made in France. The result is an even better midband and wonderful clarity.
  • Fast Recovery Diodes. Resulting in increased definition and detail, especially when the music becomes complex.
  • KT88 Output Tubes. We use the current production copy of the legendary Genalex KT88. The tube sounds wonderful, with tremendous body and punch, while still giving you the warmth and humanity you'd expect from an all-tube amplifier.

70 watts ultralinear, 40 watts triode with enough juice to drive most any speaker with ease and grace, and that famous EL-34 warmth people crave. The DiaLogue Seven monoblocks begin with the same basic topology as the top-rated DiaLogue Two integrated.

But the monoblocks reach a new level of performance using a unique dual-feedback topology: Cross-coupled current feedback for superior impulse behavior and gain stability. Next a slight amount of negative feedback is used to achieve exact gain setting, low distortion, and low output impedance. This effectively cancels the negative byproducts associated with both feedback circuits. The end result utilizes all the benefits of feed-back, without all the drawbacks.

Finally, the monoblocks integrate newly-designed, wide-band, low-loss, output transformers, built to handle even the most difficult speaker loads. Two transformers are wired in parallel in each amp for even greater control and bandwidth. A two Ohm output tap is added for additional flexibility.

Like all PrimaLuna amplifiers, it boasts:

  • Soft-start circuit Extends component and tube life by powering up the amp gently every time you turn it on.
  • Tube plate fuse Protects the amplifier output stage.
  • Adaptive AutoBias. Exclusive to PrimaLuna, this circuit monitors and adjusts bias automatically. Improved performance and better sound, with distortion reduced by 40% to 50% over conventional designs. Plug in virtually any power tube. Adaptive AutoBias will automatically adjust itself! In addition to EL-34s, you can use 6550, KT88, KT90, 6L6GC, KT66, 7581, EL37, and any of their equivalents.
  • Premium parts . Fully vented chassis, chassis-mounted ceramic tube sockets, Alps potentiometer, Nichicon and Realcap capacitors. WBT style speaker terminals. Gold plated input jacks.
  • Hand made with the finest point to point wiring, with workmanship equal to or better than any product you can buy at any price, period.
  • Chassis made of finely finished heavy gauge steel, and five step automotive quality finish. Each coat hand rubbed and polished. Removable tube cage included no charge.
  • Toroidal power transformer for low hum, and a front end that is dead quiet.
  • Conservative design runs tubes easy for long life.

Next we take the DiaLogue Seven to new heights with:

  • Triode/Ultralinear switching. Allows you to switch how the power tubes operate on the fly, via a slim aluminum remote, allowing you to stay in your nice comfy seat while switching between the two modes.
  • Improved output transformers designed for wide-bandwidth and high efficiency. These heavy-duty transformers elicit incredible detail from top to bottom, lower the output impedance, and provide the amp with greater control over speakers with difficult loads.

Built to Western standards with PrimaLuna's standard-setting build quality and unparalleled reliability.

pl-blue.png Owner's manual pdf-sm.gif


Output: 70 watts ultralinear, 40 watts triode
Freq. Response: 10Hz-100kHz +/- 3dB
THD: Less than 0.25 percent @ 1 watt,
2 percent at full power
S/N Ratio: 84dB
Input Sensitivity: 1.1V
Power Consumption : 232 watts
Dimensions: 15.2" x 8.3" x 16" (WxHxD)
Weight: 63.8 lbs
Inputs: 1 single RCA
Outputs: 2, 4 and 8 Ohm speaker taps
Tube Compliment: 2 - 12AX7, 2 - 12AU7, 4 - KT88

Warranty Information

Two years parts & labor. Six month warranty on stock vacuum tubes.

Terms & Conditions:

  • Limited to original purchaser. This warranty is for the sole benefit of the original purchaser of the covered product, and may not be transferred to a subsequent owner
  • This warranty is subject to conditions and limitations, as follows: This warrantly is void and inapplicable if the product has not been used in accordance with the instructions found in the owner's manual, or if it has been misused, abused, damaged by accident or neglect, or in transport once in possession of purchaser. The warranty is also void if the product has been tampered with or has been repaired or modified by anyone other than PrimaLuna USA, or its specifically authorized representatives.
  • If this product contains material, manufacturing, or workmanship defects, it must be packed in orginal packaging and returned to PrimaLuna USA or its authorized representative via insured freight, at the owner's expense. Returned products must be accompanied by written description of the defect, and a return authorization number (available from PrimaLuna USA). Upon receipt of the defective product, PrimaLuna USA or the authorized representative agrees to repair the product without charge for parts (except vacuum tubes if the unit is more than 6 months old), or labor. The product will then returned via prepaid, insured freight, with carrier at the sole determination of PrimaLuna USA, or the authorized representative. This constitutes the purchaser's sole remedy.
  • Design change. PrimaLuna and its partners reserve the right to modify their products or change specifications at any time without obligation or liability to previous purchasers.

Product Reviews

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  1. Tone tone tone

    Posted by koryodell on 11th Jun 2013

    I have had this amplifier for a few years pushing a varitey of speakers including the Magnepan 3.7. This is my amplifier of choice with the Magnepans. Other amplfiers (wyred for sound ST500, newclear NC1000, Adcom GFA 555 as monoblocks) might have more dynamics, but they just cant touch the tone these amplifiers have. If you want life like voices that make your toes curl, get this amp! They are magic with the mullard 12AX7 and 12AU7 combined withe the Winged SED 6550.

  2. Pretty awesome amp

    Posted by Divine Amoeba on 15th May 2013

    Works beautifully and sounds amazing. Pairing it with martin logan spires causes the highs to be somewhat attenuated because the impedance drops to 0.8 at 20k, starts tapering off much sooner thus evident in the listening portion. Blown away at how this amp handles the lows on the Martin Logan spires. Tight, well defined base and plenty off it. Triode mode is quiet awesome for select tracks. Overall very happy with this purchase and looking to get speakers that dont present such a demanding load to pair with these amps