Reply to thread

Message

<blockquote data-quote="Ivan Beaver" data-source="post: 141590" data-attributes="member: 30">Re: 60 Degree&nbsp; DIY Mid HiThis is EXACTLY where trying to use a &quot;simple single number&quot; to describe performance can get you in all kinds of trouble.With HF drivers, you HAVE to have them mounted on the same horn to get equal curves.Then you HAVE to look at the curve-NOT a single number to figure out how they compare.If one manufacturer is using a single high peak in the response and another is using more of an average, then you will get very different numbers for exactly the same curveFor example.&nbsp; Look at the CURVE of the driver that Bennett posted.&nbsp; It is rated at 108.5dB, but has a peak 5dB or higher above that.I have compared/measured some of B&amp;C&#039;s better drivers to the BMS units.On the same horn, they are very equal in sensitivity.&nbsp; The BMS units have a higher sensitivity up high.And then there is the &quot;rated power&quot; vs what they can actually handle.I will not say-or go into details- but some drivers fail much earlier than others-even when rated at the same or higher power.You have to do destructive testing under the same conditions to get usable results.I have destroyed thousands of dollars of diaphragms doing such tests.&nbsp; Things are not always as they seem or appear on paper-ESPECIALLY when using the &quot;simple numbers&quot;.&nbsp; You can get very WRONG results or expectations.</blockquote>

[QUOTE="Ivan Beaver, post: 141590, member: 30"] Re: 60 Degree DIY Mid Hi This is EXACTLY where trying to use a "simple single number" to describe performance can get you in all kinds of trouble. With HF drivers, you HAVE to have them mounted on the same horn to get equal curves. Then you HAVE to look at the curve-NOT a single number to figure out how they compare. If one manufacturer is using a single high peak in the response and another is using more of an average, then you will get very different numbers for exactly the same curve For example. Look at the CURVE of the driver that Bennett posted. It is rated at 108.5dB, but has a peak 5dB or higher above that. I have compared/measured some of B&C's better drivers to the BMS units. On the same horn, they are very equal in sensitivity. The BMS units have a higher sensitivity up high. And then there is the "rated power" vs what they can actually handle. I will not say-or go into details- but some drivers fail much earlier than others-even when rated at the same or higher power. You have to do destructive testing under the same conditions to get usable results. I have destroyed thousands of dollars of diaphragms doing such tests. Things are not always as they seem or appear on paper-ESPECIALLY when using the "simple numbers". You can get very WRONG results or expectations. [/QUOTE]

Verification