1x Beyma 755TI or 2x DE250/BMD450 ?
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Category: General
Forum Name: Electro Frying Forum
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URL: https://forum.speakerplans.com/forum_posts.asp?TID=11514
Printed Date: 27 March 2026 at 5:30am
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Topic: 1x Beyma 755TI or 2x DE250/BMD450 ?
Posted By: levyte357
Subject: 1x Beyma 755TI or 2x DE250/BMD450 ?
Date Posted: 28 August 2007 at 1:34pm
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In recent thread about CD's, Rog recommended Beyma 755TI Neo (1.4" I think), above everything else at that price. In the same thread was plenty of stuff about Y-type adaptor and multi drivers per horn, and differing opinions about perf of 2x 1" Units compared to 1x 1.4", 1.5".
Ready to buy so, wondering if anyone has tried 2x BMD450's/DE250's on adaptor to Big 2" horn, and how that would compare to 1x £140 B&C/Beyma 1.4/1.5" jobby..
Objective is "sturdy" Compression driver section (per mid top cab) from 1.6khz to 16khz @ approx 110db sensitivity.
Regards. ------------- "Who am I? I'm the guy who does his job.. You must be the other guy". |
Replies:
Posted By: uncle-will
Date Posted: 28 August 2007 at 7:22pm
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your comparing a ford to a rolls. |
Posted By: levyte357
Date Posted: 28 August 2007 at 8:46pm
Presuming the 755Ti is the Roller. Graph from pdf suggests it might need -5db eq from 2 - 10khz. Anyone else used this? ------------- "Who am I? I'm the guy who does his job.. You must be the other guy". |
uncle-will wrote:Posted By: Tekasis
Date Posted: 28 August 2007 at 9:41pm
So that leaves two - What's the ford ?
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Posted By: uncle-will
Date Posted: 29 August 2007 at 11:07am
| What your comparing is two totally different drivers, the bmd 450 is a one inch exit one inch diaphram and the beyma is a two inch exit three inch diaphram. When you have such a big diaphram on a compression driver it will always stuggle obtaining the same king of efficientcy at the upper end of the spectrum, hench a shelving filter about 6k is usually applied. With some cunning design you can find a way around it. (ref porn horn) |
Posted By: levyte357
Date Posted: 29 August 2007 at 7:53pm
No. The CP 755TI & CP755/Nd are 1.4" exit. http://profesional.beyma.com/ENGLISH/pdf/descarga.php?pdf=CP-755Ti.pdf - http://profesional.beyma.com/ENGLISH/pdf/descarga.php?pdf=CP-755Ti.pdf Rog mentioned the CP 755/Nd. I am interested in the 755TI. The pdf above graphs the 755TI as usefull upto 18khz. ------------- "Who am I? I'm the guy who does his job.. You must be the other guy". |