ESOTERIC SOUND Re-Equalizer Manual de usuario descargar pdf (Pagina 4)

Frequently Asked Questions – Model 408 (and 408A)

The 408 arrived Monday, and I've had some time to play with it. It sounds great - nice and quiet. I

have two quick questions:

1) Is it normal to perceive a large drop in output/volume when going from a flat turnover to the

standard RIAA 500Hz setting? I was listening to a few acoustic 78rpm's (flat) and then put on some

newer vinyl (500Hz) and had to really increase the gain to come close to the same levels as before

(The sound was fine - just checking if it was normal to lose so much output).

(Answer)

Yes, this is normal.

Unlike other processors such as the Owl One and the Re-equalizer, the 408 (and 408A) use fixed-

gain turnover and rolloff amplifiers in order to minimize phase and frequency distortions. This does

result in a volume drop at mid and high frequencies when switching from a FLAT to RIAA response

as shown in the graph on the following page. All other turnover and rolloff settings will produce

response curves lower than FLAT. The 408 (and 408A) use the same turnover and rolloff circuits

as the model 4010 so for some additional response curves please see the FAQ section in the 4010

User Guide.

Comparisons to the Owl One and Re-equalizer show identical response curves at various

turnover/rolloff settings. The 408 (and 408A) like the 4010 provides accurate playback response.

The 408 (and 408A) RIAA curve differs by less and 0.5 dB from the “ideal” RIAA curve.

The Re-equalizer is available from Esoteric Sound, www.esotericsound.com

The Owl One is not in production but may be available as “pre-owned equipment.”

March 2011

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ESOTERIC SOUND Re-Equalizer Manual de usuario Pagina 4