fleabag Posted March 28, 2020 Share Posted March 28, 2020 (edited) Nominal Basket Diameter 10", 254mm Nominal Impedance* 16 ohms Power Rating** Watts 350W Music Program 700W Resonance 65Hz Usable Frequency Range 71Hz - 3.7kHz Sensitivity*** 98dB Magnet Weight 56 oz. Gap Height 0.37", 9.53mm Voice Coil Diameter 2.5", 63.5mm Resonant Frequency (fs) 65Hz DC Resistance (Re) 11.6 Coil Inductance (Le) 0.79mH Mechanical Q (Qms) 8.34 Electromagnetic Q (Qes) 0.35 Total Q (Qts) 0.33 Compliance Equivalent Volume (Vas) 36 liters / 1.27 cu.ft. Peak Diaphragm Displacement Volume (Vd) 62cc Mechanical Compliance of Suspension (Cms) 0.21mm/N BL Product (BL) 19.5 T-M Diaphragm Mass Inc. Airload (MMs) 28 grams Efficiency Bandwidth Product (EBP) 186 Maximum Linear Excursion (Xmax) 1.8mm Surface Area of Cone (Sd) 344.9 cm2 Maximum Mechanical Limit (Xlim) 9mm Recommended Enclosure Volume Sealed 9.9-12.7 liters / 0.35-0.45 cu.ft. Vented 10.8-34 liters / 0.38-1.2 cu.ft. Driver Volume Displaced 86.5 cu.in. / 1.42 liters Edited May 13, 2020 by fleabag Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted March 28, 2020 Share Posted March 28, 2020 With only 1.8mm xmax they're not suitable for electric bass. That's roughly half the absolute minimum I specify for use in any of my designs. I guarantee the seller looked at inches and watts and nothing else. Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 28, 2020 Author Share Posted March 28, 2020 Thanks Bill, yes. I may not have the tech savvy, but i do take in what you and the other guys say about simply stuffing any old drivers in a cab without a second thought. I think i will remove them and put the originals back in. Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted March 28, 2020 Share Posted March 28, 2020 From the little I've seen about OEM grade SICA they may not be anything great either. I'd investigate them further before going to the trouble of putting them in. Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 28, 2020 Author Share Posted March 28, 2020 (edited) I cant find anything about them. I thought SICAS were blue coloured, at least when they supplied them back when , so they may not be SICAS. I tried googling those numbers on the back in the photo, but google threw up nothing. Edited March 28, 2020 by fleabag Quote Link to comment Share on other sites More sharing options...
billynoband Posted March 29, 2020 Share Posted March 29, 2020 I think most combos and cheap cabs are a fair low volume compromise but suffer from a less than ideal cab design or speaker choice to go loud. I opened one brand new well known make of cab and found a 100 watt speaker in a cab rated at 200 watts at 8 ohms. When I contacted the maker they said if the speaker failed they would replace but it never did and I never had trouble with it at medium volume. I reckon your combo is ok for most uses? Changing any speaker in a combo is very hit and miss but may be ok for low and medium volume. I have used a few less than perfectly designed combos in the past and managed. Do you have a decent extension cab that is great quality and a keeper? I am a fan of Bills diy cabs and it always surprised me how much volume comes out of ones i made using just a single Beta 10 speaker compared to cheap commercial cabs i used. 1 Quote Link to comment Share on other sites More sharing options...
BassBunny Posted March 29, 2020 Share Posted March 29, 2020 If Ashdown are still working, contact them. They'll tell you what the original speakers are. I'm still getting emails from them, so suspect someone is around. 1 Quote Link to comment Share on other sites More sharing options...
grenadillabama Posted March 29, 2020 Share Posted March 29, 2020 I have the Avatar version and it has been altered to be "bass guitar friendly ". I think it is a driver best suited for vocals because of the midrange. I threw in a Beta 10 Eminence with 5 Ashdown Bluelines and it is OK in a ABM 610 cabinet. 1 Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted March 29, 2020 Share Posted March 29, 2020 Bill is right the Delta/Alpha/Beta 10s are less than ideal for bass and unlikely to improve on the stock drivers. Remember the cabinet was tuned to get the best out of the drivers it was supplied with subject to the contraints of cost/the marketing department etc. As for the original Blue Line driver, it could well be a SICA but probably made in the far east under licence in the same way that Eminence do. The real clue is in the lettering on the back of the driver. The contries thta use the graphical writing style tend to favour serifed fonts whearas Western countries favour non -serifed characters. My advice is to put the original drivers back in. 1 Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted March 29, 2020 Share Posted March 29, 2020 There's more than one Delta 10. The A version, 8 ohms, has 3.5mm xmax, which is adequate. The B version, 16 ohms, has 1.8mm xmax, which is not adequate. 1.8 mm versus 3.5mm xmax means the B will only take half the voltage, one quarter the power, before heavy distortion occurs. Even the A is no prize, with a resonant frequency (Fs) of 66Hz it's best employed as a PA midbass, with separate subs handling the lows. Both the Alpha 10 and Beta 10, with Fs of 50 and 53Hz respectively, are better for electric bass. 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 29, 2020 Author Share Posted March 29, 2020 (edited) Followed advice, originals back in for now, but right now i'm waiting for a pair of quiet fans to be delivered, because the stock ones are too noisy, so the amp is out of the box. I have been mulling over other drivers , just maybe for the future, and like the look of the Beyma 10G40 at Blue Aran https://usspeaker.com/beyma 10G40-1.htm Edited March 29, 2020 by fleabag Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted March 29, 2020 Share Posted March 29, 2020 That's a great driver, but probably overkill/overpriced for your needs. Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 29, 2020 Author Share Posted March 29, 2020 I had my doubts Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 29, 2020 Author Share Posted March 29, 2020 One question regarding the fans on the back of the amp, something i should have checked before pulling them out, do they blow inwards onto the heatsinks, or extract the air off the heatsinks and blow it out the back of the amp ? Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted March 30, 2020 Share Posted March 30, 2020 If you look at the fans they will have an arrow on the top usually pointing to the direction of airflow. 1 Quote Link to comment Share on other sites More sharing options...
pete.young Posted March 30, 2020 Share Posted March 30, 2020 21 hours ago, fleabag said: One question regarding the fans on the back of the amp, something i should have checked before pulling them out, do they blow inwards onto the heatsinks, or extract the air off the heatsinks and blow it out the back of the amp ? Usually the latter. 1 Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted March 30, 2020 Share Posted March 30, 2020 You need to look at the amp as it may be that one fan blows inwards, the other blows outwards. It depends on where they are placed. 1 Quote Link to comment Share on other sites More sharing options...
Phil Starr Posted March 30, 2020 Share Posted March 30, 2020 As Bill has said those drivers are overkill, not to mention the weight! They are way cheaper over here though. I think you have used the SM110's before but these might be worth a look https://www.bluearan.co.uk/index.php?id=BMA610CVM28&browsemode=manufacturer I know @Chienmortbb has tried the 12" version and is fairly impressed. 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 30, 2020 Author Share Posted March 30, 2020 (edited) 2 hours ago, Chienmortbb said: If you look at the fans they will have an arrow on the top usually pointing to the direction of airflow. Thanks and will check them, but its which way they were facing that i dont know, because i pulled them out before checking Edited March 30, 2020 by fleabag Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 30, 2020 Author Share Posted March 30, 2020 2 hours ago, Chienmortbb said: You need to look at the amp as it may be that one fan blows inwards, the other blows outwards. It depends on where they are placed. They were both facing the same way, so either both blowing or both extracting The red wire off each were joined and the black wires were joined as well Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 30, 2020 Author Share Posted March 30, 2020 20 minutes ago, Phil Starr said: As Bill has said those drivers are overkill, not to mention the weight! They are way cheaper over here though. I think you have used the SM110's before but these might be worth a look https://www.bluearan.co.uk/index.php?id=BMA610CVM28&browsemode=manufacturer I know @Chienmortbb has tried the 12" version and is fairly impressed. Yes Phil i did use the SM110/n drivers in my two 2x10 cabs at the time Those in your link look great, but i'll wait till my new fans arrive, and check what the combo sounds like with the originals, as they're now mounted back in. I wont be upgrading unless its necessary Quote Link to comment Share on other sites More sharing options...
Mottlefeeder Posted March 30, 2020 Share Posted March 30, 2020 On 29/03/2020 at 19:27, fleabag said: One question regarding the fans on the back of the amp, something i should have checked before pulling them out, do they blow inwards onto the heatsinks, or extract the air off the heatsinks and blow it out the back of the amp ? If you want to cool your hot drink, do you blow or suck? A fan in suction pulls air from anywhere on the suction side. A fan blowing directes the air in a particular direction. If you want something cooled, the fan should blow onto it. David 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 30, 2020 Author Share Posted March 30, 2020 Excellent point Mott Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted March 30, 2020 Share Posted March 30, 2020 My preference is blowing out. Blowing in can result in dust accumulation on the heatsink, reducing its effectiveness over time. I've seen fans with filters to prevent dust from ending up inside, on computers, but not on amps. They're not a panacea either, you have to periodically clean the filters. Pro-sound rack mount power amps can be either in or out flowing, with the fans on either the front or back. With those I've seen occasions where an out flow from one amp can get pulled into the in flow of another amp, leading to a very uncool result. Quote Link to comment Share on other sites More sharing options...
fleabag Posted March 31, 2020 Author Share Posted March 31, 2020 Having now checked the fans, they were blowing in onto the heat sinks, and judging by the dust on the fins of the sinks, that confirms what you say Bill, although it wasnt a huge amount of dust But since Ashdown designed the fans to blow in and not extract out, i shall be mouting the new ones to blow onto the heat sinks Quote Link to comment Share on other sites More sharing options...
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