[bagwell359]

Chord Mojo.

No I mean something like 30 - 40 hz.

And this is constant on all tracks actually. The HD 650 simply is stronger there. In the midbass as well obviously, but also in the subbass on my system.

How long have you had the 500's? Any damage? Mods?

650 to my ear is like the 600 but more veiled. The 500 is a bit underdamped, but has good tone in the bass.

Can you list one or two tracks that shows this issue?

 

[dakanao]

How long have you had the 500's? Any damage? Mods?

650 to my ear is like the 600 but more veiled. The 500 is a bit underdamped, but has good tone in the bass.

Can you list one or two tracks that shows this issue?

2 weeks now. It had the Fuzzor mod from the previous owner, and it doesn't sound damaged in the mids and highs.

For example, the bass line in this track @ 0:14 (I don't like this track anymore since a few years, but it's a good song to test subbass) is clearly stronger in the HD 650

 

[BrokeSkoolBoi]

Chord does not have a lot of power at all with only 750mW at 8ohms which is a pretty useless measurement because apparently output Impedance is 75 ohms so you can't use iems on it. Try another source. My apologies if I'm misunderstanding anything about your source.

 

[bagwell359]

First place the HE-6 or HE-500 lose it is in the bass w/0 enough juice. I figure about 150 mW @ 38 ohms on your amp, something like 750 would be more like it. 2 wpc would be very good, I have about 13 wpc @ 38 ohms and have never seen that problem.

 

[vlach]

Chord mojo apparently output Impedance is 75 ohms.

Good to know. I did not know that.

 

[dakanao]

Chord does not have a lot of power at all with only 750mW at 8ohms which is a pretty useless measurement because apparently output Impedance is 75 ohms so you can't use iems on it. Try another source. My apologies if I'm misunderstanding anything about your source.

Actually, the output impedance is 0.75 ohms, not 75

 

[dakanao]

First place the HE-6 or HE-500 lose it is in the bass w/0 enough juice. I figure about 150 mW @ 38 ohms on your amp, something like 750 would be more like it. 2 wpc would be very good, I have about 13 wpc @ 38 ohms and have never seen that problem.

Hmm, but I need a lot less volume on the HE-500 than the HD 650, and there's plenty of volume waaay before max with both headphones?

 

[bagwell359]

It's been some time since I thought about this stuff re: Magnepan speakers. Planars are easy loads on an amp in terms of impedance but they require a good amount of volts/amps, more than many dynamic types. And 500's starve in the bass first. Can you get access to a beefy amp?

Web says that the match should work. Maybe the magnets in the 500 are not well?

 

[alpovs]

apparently output Impedance is 75 ohms

Actually, the output impedance is 0.75 ohms, not 75

From Chord's website https://chordelectronics.co.uk/product/mojo/:
Output Impedance: 75mOhms

"m" is for milli: https://en.wikipedia.org/wiki/Milli-, so it's 75 milliOhms or 0.075 Ohms. Very good if true.

Missed classes at school?

And:

• Output Power @ 1kHz – 600Ω 35mW
• Output Power @ 1kHz – 8Ω 720mW

It's a guess what's at 38 Ohms (HE-500's impedance) but it seems not enough to power the HE-500 properly.

 

[BrokeSkoolBoi]

From Chord's website https://chordelectronics.co.uk/product/mojo/:
Output Impedance: 75mOhms

"m" is for milli: https://en.wikipedia.org/wiki/Milli-, so it's 75 milliOhms or 0.075 Ohms. Very good if true.

Missed classes at school?

And:

• Output Power @ 1kHz – 600Ω 35mW
• Output Power @ 1kHz – 8Ω 720mW

It's a guess what's at 38 Ohms (HE-500's impedance) but it seems not enough to power the HE-500 properly.

Lol relax. The website I clicked on gave misinformation. It wasn't chord's website.

Edit :thought you were only responding to me, thx for the correct info regardless.

 

[vlach]

From Chord's website https://chordelectronics.co.uk/product/mojo/:
Output Impedance: 75mOhms

"m" is for milli: https://en.wikipedia.org/wiki/Milli-, so it's 75 milliOhms or 0.075 Ohms. Very good if true.

Missed classes at school?

And:

• Output Power @ 1kHz – 600Ω 35mW
• Output Power @ 1kHz – 8Ω 720mW

It's a guess what's at 38 Ohms (HE-500's impedance) but it seems not enough to power the HE-500 properly.

Ok, that makes more sense and driving iems should be a non-issue. Thank you.

 

[carlosgab]

If I may share, my HE500 sounds more dynamic and bassier from my Gilmore Lite Mkii Class A than my THX 789.

 

[kid vic]

Chord Mojo.

No I mean something like 30 - 40 hz.

And this is constant on all tracks actually. The HD 650 simply is stronger there. In the midbass as well obviously, but also in the subbass on my system.

It's been some time since I thought about this stuff re: Magnepan speakers. Planars are easy loads on an amp in terms of impedance but they require a good amount of volts/amps, more than many dynamic types. And 500's starve in the bass first. Can you get access to a beefy amp?

Web says that the match should work. Maybe the magnets in the 500 are not well?

The mojo is just not an adequate power source for the HE500. It's brilliant for portable use and IEMs but I'm sure even your HD650s are underperforming with them.

 

[sennfan83261]

If I may share, my HE500 sounds more dynamic and bassier from my Gilmore Lite Mkii Class A than my THX 789.

Are you running the HE-500 single-ended or balanced from the THX AAA 789?

 

[carlosgab]

Are you running the HE-500 single-ended or balanced from the THX AAA 789?

Balanced. Though the DAC input from D50 is SE