Copyright © 1998
Cadman Enterprises Ltd
Welcome to the Graham Slee Audio Products Owners Forum ![]() Open to all owners plus those contemplating the purchase of a Graham Slee HiFi System Components audio product and wishing to use this forum's loaner program: join here (Rules on posting can be found here) This website along with trade marks Graham Slee and HiFi System Components are owned by Cadman Enterprises Ltd |
Loudspeaker EQ |
Post Reply ![]() |
Page 123 5> |
Author | |
Fatmangolf ![]() Moderator Group ![]() ![]() Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8629 |
![]() ![]() ![]() ![]() ![]() Posted: 22 Aug 2016 at 10:37pm |
I have a relatively small living room with large speakers so sit closer to them than the manufacturer probably intended. I have fitted a switch on the underside of the cabinet (on the crossover access panel) that can reduce the tweeter output by about 2dB. The manufacturer had used a 1 ohm wirewound to feed the HPF part of the crossover which is about 8 ohms impedance including the ribbon tweeter, probably to balance the speaker response for expected use in a large room. I inserted a new 2.2 ohm w/w resistor in series with a switch that shorts it out when it is in the forward position.
PMC build a similar switch into the Fact 8 speakers I heard at Phil's place, although his were in a large room and sounded great on 0dB. For my speakers it is a subtle change that allows more toe-in without too much treble at close range. |
|
Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
|
![]() |
|
JamesD ![]() Senior Member ![]() ![]() Joined: 05 Nov 2012 Location: Bolsover Status: Offline Points: 246 |
![]() ![]() ![]() ![]() ![]() |
I did something similar to my speakers when they were in a small room. Now they're in a big room the switch and resistor have been taken out again.
I notice however that my old "bedroom" Pioneer receiver from 1967 (that was their first transistor design and cost the equivalent of £3000 today) has tone controls that must have served a similar purpose.... 😉 |
|
Aren't ears brilliant
|
|
![]() |
|
DaveG ![]() Senior Member ![]() Joined: 26 Oct 2014 Location: London Status: Offline Points: 479 |
![]() ![]() ![]() ![]() ![]() |
I think the same kind of switchable treble response is common in studio monitors too. Makes sense in a smaller room where larger speakers are a bit more difficult to get right. They do often have a sense of effortless dynamics that u rarely get in smaller speakers so probably worth the extra effort.
|
|
Dave
Michell Gorbe + HR PSU -> Cadenza Bronze -> SME V -> Elevator -> Accession -> Proprius -> B&W CM6 s2 | Cusat 50 & Spatia cables -> ![]() |
|
![]() |
|
JamesD ![]() Senior Member ![]() ![]() Joined: 05 Nov 2012 Location: Bolsover Status: Offline Points: 246 |
![]() ![]() ![]() ![]() ![]() |
If someone cares to give me some 15" Tannoy Monitor Golds to show me effortless dynamics I won't be offended.
|
|
Aren't ears brilliant
|
|
![]() |
|
Fatmangolf ![]() Moderator Group ![]() ![]() Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8629 |
![]() ![]() ![]() ![]() ![]() |
Thanks James, I'm relieved I'm not the first to retrofit this kind of switch and I too thought "treble cut" was easier in the old days! |
|
Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
|
![]() |
|
morris_minor ![]() Moderator Group ![]() ![]() Joined: 27 Mar 2012 Location: Surrey Status: Offline Points: 5910 |
![]() ![]() ![]() ![]() ![]() |
My Dad used to have some Tannoy III LZ speakers which had a couple of controls on the back for treble energy and slope (?). At the time neither he or I knew what to do with them!
![]() |
|
Bob
Majestic DAC/pre-amp Accession MC/Enigma, Accession MM, Reflex M, Elevator EXP, Era Gold V Solo ULDE, Novo, Lautus USB and digital, Libran balanced, CuSat50 2 x Proprius + Spatia/Spatia Links |
|
![]() |
|
Fatmangolf ![]() Moderator Group ![]() ![]() Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8629 |
![]() ![]() ![]() ![]() ![]() |
I'd never thought much about speaker EQ before as I thought the w/w pots for tweeters in 1970's and 80's were a gimmick and I'd lazily assumed the Tannoy controls were specific to their drivers. It was the graph PMC give for their HF shaping that clicked for me - resistor in series to reduce tweeter level not change the crossover slope.
|
|
Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
|
![]() |
Post Reply ![]() |
Page 123 5> |
Tweet
|
Forum Jump | Forum Permissions ![]() You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |