|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
203.127.112.190
This was stated by the manufacturer:
"PHONO"
(Pre-amp bypassed) - 4 mV nominal at 1 kHz, 5 cm/sec "LINE"
(Pre-amp engaged) - 150 mV nominal at 1 kHz, 5 cm/sec
How do you calculate the gain of the built-in Phono of this turntable?
Thanks in advance
Follow Ups:
.
Hi, Jerome,
I use the online calculator linked below.
If I understand the specs, the cartridge's voltage output voltage is increased from 4mV to 150mV, under otherwise identical conditions. This is a voltage gain factor of 37.5:1
The dB gain = 20*log (V2/V1) = 20 * log 37.5 = 31.5dB
That is a little low for a phono stage but likely won't give you any problems. Anyhoo, there's a lot of other factors at play that affect the sound quality (such as the overload sensitivity of the phono preamp at low frequencies- often a problem for modest phono preamps). You may find you have to turn the amplifier's volume control up for the turntable versus the CD player. For example, if your amp's line-level input sensitivity is around 400mV, that implies it needs the volume control to be set about 8-9dB higher for your 150mV preamp to achieve the same sound level.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: