Search found 1081 matches

by vinylnvalves
Thu Apr 18, 2024 9:58 pm
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 242
Views: 304383

Re: Something Stirs in the Workshop

The blue one is the 30hz to 120hz range, it’s a 2nd order LR crossover, not the higher order i mistakenly quoted before. There isn’t any HF output that I can hear. The measurement are all indoor, so the room contributes too.
by vinylnvalves
Thu Apr 18, 2024 7:56 pm
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 242
Views: 304383

Re: Something Stirs in the Workshop

Followed the instructions off Brian Steeles subwoofer site on time alignment, changing to an (MSL)modified square wave input signal without much success. I seem to get too much noise on the bass/mid driver signal to really distinguish the phase and time of the impulse signal. Will have try REW to se...
by vinylnvalves
Wed Apr 17, 2024 10:10 pm
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 242
Views: 304383

Re: Something Stirs in the Workshop

I am using IIR filters as I am running out of processor power, with 8 channels. I obviously assumed wrongly that the delay would be constant across all channels, so the time differences between channels wouldn’t be considerable.
by vinylnvalves
Wed Apr 17, 2024 9:05 pm
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 242
Views: 304383

Re: Something Stirs in the Workshop

I have a 2nd order LR at 120 Hz, for the sub, crossing with the low mid which covers upto 1600hz. All active crossovers
by vinylnvalves
Wed Apr 17, 2024 5:57 pm
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 242
Views: 304383

Re: Something Stirs in the Workshop

Saw an article about time aligning drivers with a impulse response... so i had a play in Holm impulse. Tried time aligning the sub to the bass driver - both are effectively sealed, so wasnt expecting an massive difference in group delay. The plots would suggest otherwise, The blue trace is the sub. ...
by vinylnvalves
Tue Apr 16, 2024 10:30 pm
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 242
Views: 304383

Re: Something Stirs in the Workshop

They are for 1.4” drivers - matched the throat angle for the SB Rosso driver. Chris, I can send you the AKABAK input files for a 2” version if you want.. I haven’t got my head around running AKABAK yet, it’s alien to me :D
by vinylnvalves
Mon Apr 15, 2024 8:22 pm
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 242
Views: 304383

Re: Something Stirs in the Workshop

Just finished the test horn, shipping it out for evaluation. Bit trickier than first thought as had to recontour the inner after a late change in throat angle, plastic wood filler to make the inner match, as cannot add wood. Not my finest work, as cobbled together out of the firewood box, and glued ...
by vinylnvalves
Mon Mar 18, 2024 9:18 am
Forum: Speakers
Topic: TG "The Loudspeaker" Build (Sort of)
Replies: 88
Views: 8857

Re: TG "The Loudspeaker" Build (Sort of)

Regarding router cutters, I went through a bunch of trend cutters that kept breaking. I was using then with the CNC, taking off 0.5mm cuts and they still failed. Got fully refunded for them as they were defective. Silverline ones from tool station are good for a while. I use either CMT cutters or on...
by vinylnvalves
Sat Mar 16, 2024 12:45 pm
Forum: Buying and Selling
Topic: Amplifier Bits and Bobs
Replies: 0
Views: 737

Amplifier Bits and Bobs

Having had this box of bits collecting dust for years, I have concluded I won’t be building any more valve amps in the future so it’s time to free up some space and money. I was going to build a 4PL1 PSE amp and bought most of the bits for it, but that’s as far as it got. The transformers and valve ...
by vinylnvalves
Sun Mar 03, 2024 9:59 am
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 242
Views: 304383

Re: Something Stirs in the Workshop

Just started making a test horn ( 1.4”) for open baffle speaker project.. for someone. The rear section, quite fiddly as have to do it in multiple sections, to get a flange to mount the horn too. Will finish the mouth when I get back after a weeks break. 011DD223-712E-458F-9E7B-FBF2A0FB78E6.jpeg D88...
by vinylnvalves
Fri Mar 01, 2024 9:15 am
Forum: Everyones Projects
Topic: 6550 SE Amplifier
Replies: 110
Views: 11019

Re: 6550 SE Amplifier

Benefits are broken and so is the NHS. Instead of looking at whats broken, point your gaze at the ones that broke it. I agree that the current regime is to blame for most of this… however. I read somewhere that the whole welfare/ heath system was originally costed on people living 3 years after ret...
by vinylnvalves
Thu Feb 22, 2024 11:47 am
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 6163
Views: 1911885

Re: What Are You Listening To Right This Minute?

Very much in the vain of CSN&Y..
D3E3953B-5920-44C3-9798-CEAA53742EE6.jpeg
D3E3953B-5920-44C3-9798-CEAA53742EE6.jpeg (30.92 KiB) Viewed 2630 times
by vinylnvalves
Thu Feb 22, 2024 10:00 am
Forum: Speakers
Topic: TG "The Loudspeaker" Build (Sort of)
Replies: 88
Views: 8857

Re: TG "The Loudspeaker" Build (Sort of)

Having been involved with a pair of Troels DQWT in the past, I wasn’t impressed by that design. On the topic of small horns, I am currently doing some horns for a 1.4” driver for an open baffle design, similar to the Perry Marshall OB speakers, but looking at using a newer horn design that has a wei...
by vinylnvalves
Fri Feb 16, 2024 2:40 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16488
Views: 4842320

Re: Nothing In Particular

Wonder if they do a check of the system when they change the meter, it used to be the case ( back in the 80’s) when I worked for BG transmission, the last person who touches it is liable - Paul will put us right :D
by vinylnvalves
Fri Feb 16, 2024 2:01 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16488
Views: 4842320

Re: Nothing In Particular

The incoming meter and Bluetooth transmitter, not the “smart meter”. The gas used to turn the dial via a paddle that measured flow, so some would say a retrograde step…