SIVGA 004 vs 005 vs 006 vs 007 Cross-Comparison

Given that these are all the same price, I consider them to be variations of the same headphone. Therefore, I figured it would be good to distinguish the differences between the four models. Really nice! -- Sivga 004 -- Amazon: https://amzn.to/2Ezzecb -- Sivga 005 -- Amazon: https://amzn.to/2C2ENQ2 -- Sivga 006 -- Amazon: https://amzn.to/2Tj327f -- Sivga 007 -- Amazon: https://amzn.to/2EK60IH ** I am an Amazon Associate. Clicking on these links and buying from them helps the channel out. Thanks! ** ---- Recommended Products: ---- ** Sennheiser HD600 ** -Amazon: https://amzn.to/2W8K2WH ** Sennheiser HD800S ** -Amazon: https://amzn.to/2BjW7iZ ** Hifiman HE-4XX ** -Massdrop: https://www.massdrop.com/buy/massdrop-x-hifiman-he4xx-planar-magnetic-headphones ** Audeze LCD-2C ** -Amazon: https://amzn.to/2RI657Q ** Sennheiser HD650/6XX ** -650 through Amazon: https://amzn.to/2REy74d -6XX through Massdrop: https://www.massdrop.com/buy/massdrop-sennheiser-hd6xx ** Sennheiser HD58X Jubilee ** -Massdrop: https://www.massdrop.com/buy/massdrop-x-sennheiser-hd-58x-jubilee-headphones ** Koss Porta Pro ** -w/mic through Amazon: https://amzn.to/2AW9eXf -X through Massdrop: https://www.massdrop.com/buy/massdrop-x-koss-porta-pro-x-headphones ** Koss KPH-30i ** -Amazon: https://amzn.to/2AW9hlT ** AKG K7XX ** -Massdrop: https://www.massdrop.com/buy/akg-k7xx-massdrop-first-edition-headphones