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发表于 2008-10-31 07:59:36
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继续探究dac1使用匹配情况， jeff capri最大输入电压为7 volt rms.
在没有仪器的情况下， 把-10db时电压增益调到最大6.91 volt rms时动态最好。
有仪器的情况下， 倒是可以试试调整0db的电压。
看来dac1的factory preset -20db完全是用于录音室的主动喇叭，而且是用于实时超近场监听，这样的设置能在很大的音量调整范围内听到最多的细节。
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发件人： Rory Rall :
收件人： Bruce Shen
发送时间： Thu Oct 30 22:07:48 2008
主题： RE: 答复： RE: 答复： RE: audible distortion at 0db jumper setting.
From the manual, page 10. Remember, there are no ‘stops’ on the calibration pots. Once you get to a certain point, no further change will occur.
Output Level Range (at 0 dBFS) In “Calibrated” Mode: +9 dBu to +29 dBu (Attenuator off) (2.18Vrms -21.84Vrms)
-1 dBu to +19 dBu (Attenuator = 10 dB) (0.691Vrms – 6.91Vrms)
-11 dBu to +9 dBu (Attenuator = 20 dB) (0.218Vrms -2.18Vrms)
I’ve added the voltages in blue. I hope this helps.
Rory Rall
Sales Mgr.
Benchmark Media Systems, Inc.
203 E. Hampton Place, Ste 2
Syracuse, NY 13206
http://www.benchmarkmedia.com
800-262-4675
fax 315-437-8119
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From: Bruce Shen
Sent: Wednesday, October 29, 2008 11:01 PM
To: Rory Rall
Subject: RE: 答复： RE: 答复： RE: audible distortion at 0db jumper setting.
Importance: High
Rory,
what will be the maximum Vrms output at -10db level after adjusting caliberation pots clockwise?
What will be the Vrms gain per 1 turn of caliberatiojn pots?
Thx.
Best regards,
Bruce Shen |
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