RCF 4001-A
Printed From: Speakerplans.com
Category: General
Forum Name: General Forum
Forum Description: Open Discussion / Questions
URL: https://forum.speakerplans.com/forum_posts.asp?TID=109327
Printed Date: 27 March 2026 at 7:52am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: RCF 4001-A
Posted By: Earplug
Subject: RCF 4001-A
Date Posted: 16 November 2025 at 1:59pm
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Yesterday, someone dropped off a couple of old RCF 4001 cabs for me to service. The first thing I noticed was a huge difference in the HF response between the 2 cabs. Really bad. On opening, I found 2 different drivers! One a Phonic thing, the other some no-name Chinese crap.  On searching a bit, I haven't been able to find out too much about the cab, like what was the original HF driver. Anyone here know what those might be? Ta. ------------- Earplugs Are For Wimps! |
Replies:
Posted By: KDW32
Date Posted: 16 November 2025 at 5:33pm
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RCF ND140-MT |
Posted By: Earplug
Date Posted: 16 November 2025 at 6:12pm
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Ok, thanks.  ------------- Earplugs Are For Wimps! |
Posted By: KDW32
Date Posted: 17 November 2025 at 8:14am
| No problem. Shame the original cd have been replaced its not like the original RCF diaphragms are expensive. |
Posted By: Earplug
Date Posted: 17 November 2025 at 8:43am
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Yeah. The mids have been changed as well. They now have a couple of Monacor drivers, so something drastic must have happened. These:- https://www.audiophonics.fr/en/midrange-midbass-full-range/monacor-sph-165kep-speaker-driver-midbass-60w-8-ohm-89db-o165cm-p-836.html" rel="nofollow - https://www.audiophonics.fr/en/midrange-midbass-full-range/monacor-sph-165kep-speaker-driver-midbass-60w-8-ohm-89db-o165cm-p-836.html I'm not going to bother changing those, as they seem to be ok, but the HF is important. As least put in 2 that sound the same!! ------------- Earplugs Are For Wimps! |
Posted By: KDW32
Date Posted: 17 November 2025 at 12:27pm
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Is that Monocor a Hi-fi driver? Lucky that 4PRO didn't have the phase ball in the mid born like the bigger models. They would have chopped that out to fit the Monocor's
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Posted By: Earplug
Date Posted: 17 November 2025 at 1:12pm
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Yeah, some sort of hi-fi mid-bass driver. The little phase plug thing looks good tho'! ------------- Earplugs Are For Wimps! |