22 replies to this topic

[syd-monster]

I know there's a few of us who have used either or both, I have some questions.

- Track 8 "Fever" of Chesky 10 - There is some really low sound/information on there. Does anyone know what it is or whats is supposed to be? My home reference system doesn't have the very low end that my IB 18" in the car does hence I don't have anything to compare by. This is a very low(freq) sound and kinda undefinable... by feel/ear, but is certainly there. Im either not reproducing it well enough or I'm not learned enough to pick out what instrument/sound it is.
I didn't get a chance to listen to this track at Len Wallis so I'm a little dumb found to exactly what low stuff is. It's not a drum/percussion, but something with body/sustain, so don't know if its a reverberation of the bass body or what.

- Alpine 9887 - have users found the volume control to be linear in its increase?? I seem to have found that from the displayed level of 24 and up there seems to be a significant gain/level increase that's not liner with the rest of the scale. Maybe this is to do with the sensitivity of my set up or the fact that my older generation amps are used to the usual 2V input levels.
I will eventually put it on a scope to see if this rings true (using tones & pink noise), but wondered if any other users have encountered this.

[icacha]

from memory Chris, most alpine units dont gain much once you get to the upper limits of the volume, say 30 and up

[syd-monster]

I see, thanks George . I'm kinda suspect of this. So i'm thinking of pulling it out and connecting it to my home reference and seeing if i get similar results.

[scuzzy]

I find from 30 to 35 on my system (not sure if this is just after imprint) it seems to increase the subwoofer/lower frequencies only.

[syd-monster]

hmmm, I don't have Imprint and don't even use t/a. But that is interesting Scuzzy... cheers to you too.

[simplesq]

syd-monster, on Oct 29 2009, 11:56 PM, said:

hmmm, I don't have Imprint and don't even use t/a. But that is interesting Scuzzy... cheers to you too.

Kudos to you Chris for not using T/A, no doubt that you too are old school...

[BMWTurbo]

Try 'Grandma's Hand's' Syd... There some foot tapping, cetered around 30hz, that a lot of systems won't really allow you to feel.

I don't have the Chesky disc to try unfortunately, but are you referring to this track "Fever" - Jeannie Bryson ? I have on another disc and it does have some low end material.

Edited by BMWTurbo, 30 October 2009 - 08:14 AM.

[syd-monster]

BMWTurbo, on Oct 30 2009, 09:09 AM, said:

Try 'Grandma's Hand's' Syd... There some foot tapping, cetered around 30hz, that a lot of systems won't really allow you to feel.

Yep, know all about that and its something we judge with. The foot tap is clear and present in my car and reference system. No problems reproducing that and making it seem believable.

Quote

I don't have the Chesky disc to try unfortunately, but are you referring to this track "Fever" - Jeannie Bryson ? I have on another disc and it does have some low end material.

I know that there is something there, I just want to find out what it is, and is it just as strong/loud for others. As I want to compare so that I'm not reproducing it as an unusual peak.
Cheers Bud!

[syd-monster]

Giving this a bump, just in case some one has any more input.

[eclipse_DYN]

I have a 9887 and find that the volume control is definately whacked. From 24-28 there is massive jumps in volume, from 28-30 smaller jumps, and from 30-35 seems to change nothing. Im not using imprint, although I am using a little T/A.

[syd-monster]

^^^ thank you. I too find the 24+ range seems to be really of line. Again no scope as such to know for sure.

[Pulse-R]

welcome to the world of poor gain structure.
digital volume controls are often 'para-logarithmic' in nature, and not very well conceived...

0 to 10 = 4dB per step
11 to 20 = 2dB per step
21 to 30 = 1.5dB per step
30 to 35 = 1dB per step

is very common

although the hardware can easily do -80 to 0dB in 0.5dB steps, it is seldom implemented that way.

[syd-monster]

cheers Simon, so the volume/gain knob is more of a digital counter? Is this (probable?) true to with all modern h/u's of this nature or is there a chance that the way the 9887 is built its more common to that model?

[~thematt~]

See, thats why I like my P90 so much. It indicates gain-stage movements in decibels.

Its 'para-logarithmic', but each step is indicated as "xdB"

It mutes below -75. 5dB jumps for each 'click' (-75 to -50dB), then 4dB jumps (-50 to -36dB), then 3dB (-36dB down to -20dB), then 2dB (-20 to -10dB) then one (-10dB to 0).

Very logical, very simple. Very easy to use. Doesnt have the problem the HXD2 does, where you're spinning forever (0.5 or 1dB changes through the entire range) just to get a decent volume change, or the Alpine (where it always seems to 'not work' in the louder volume ranges)

[syd-monster]

matt, if only, if only $$$ allowed, I too would P90 (or similar).