Amperex

2x Amperex PQ 6922 = E88CC D-getter - Heerlen, NL 1958 (7L4 ⊿8G) - Near NOS

Name: 2x Amperex PQ 6922 = E88CC D-getter - Heerlen, NL 1958 (7L4 ⊿8G) - Near NOS
Brand: Amperex
SKU: 266922284669
Price: 674.25 USD
Availability: InStock

2x Amperex PQ 6922 = E88CC D-getter - Heerlen, NL 1958 (7L4 ⊿8G) - Near NOS

$674.25 USD

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Soundlumia's Opinion

The "textbook Heerlen sound" has been referenced in several Soundlumia E88CC listings, and many tube enthusiasts asked what all that means. So here is the answer: the late 1950s and very early 1960s tone, the beginning of over a decade's excellence in sound, the classic tonal template for all the great (and greater) Amperex/Philips/Valvo/Miniwatt tubes to be made in the years to come, the timeless Philips radio tone that many of us grew up listening to.

The most distinctive sound feature of Holland 6922 is the transparent, natural and expansive midrange presentation, with a slight touch of warmth that illuminates your music. Every piece of music you play through these tubes sounds like from a vinyl record, whether your sound source is phono or not. The sound stage is spacious, deep and structured. Bass is incredibly deep but well controlled and feels as accurate as on super high-end German E88CC and CCa tubes.

Professional Sound Evaluation

The pair worked wonderfully and sounded terrific in our professional studio setup for monitoring.

- Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC

- Amplification: Liquid Platinum Tube Amplifier by Alex Cavalli

- Output: Focal Clear MG Pro open-back headphones

Our full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above.

Professional Tube Testing

This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:

Tube 1:

Measured transconductance(GM): 12.75/10.38 mA/V - 102%/83% (100% = 12.50 mA/V)

Measured plate current(IA): 17.759/15.314 mA - 118%/102% (100% = 15 mA)

Tube 2:

Measured transconductance(GM): 11.55/11.73 mA/V - 92%/94% (100% = 12.50 mA/V)

Measured plate current(IA): 14.714/15.051 mA - 98%/100% (100% = 15 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

Appearance & cosmetic condition

Silkscreen: 98% - 100%